Improvement in churns



J. THOMPSON.

Churn.

Pa'ten'ted March v 22, 1864.

i llhvrrn rares PATENT JAMES THOMPSON, OF VEVAY, INDIANA.

IMPROVEMENT IN CHURNS.

Specification forming part of Letters Patent No. 42,029, dated Marr-h 22, 1864,

To all whom it may concern:

Be it known that I, JAMns THOMPSON, of Vevay, Switzerland county, Indiana, have invented a new and useful Improvement in Ghurns; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specifi` cation.

Figure 1 is a transverse section of my improved churn. Fig. 2 is a longitudinal section thereof. Fig. 3 shows the driving shaft and accessories detached.

The wooden bottom A of the tub A and a false bottom, B, ofzinc or other suitable metal, inclose between them a chamber, C, for the reception of hot or cold water. It is necessary that the zinc bottom B should fit the ends and sides of the tub perfectly water-tight, and yet be readily removable, the zinc being liable to wear out more quickly than the other portions. rIhis twofold desideratum is secured by the followingconstruction: The zinc is curved slightly downward in the middle, so as to be parallel, or nearly so, with the curved Wooden bottom A, and is anged at the edges b b' to occupy grooves in the ends of the tub, its ends e c occupyinggrooves in the tubvsides.

D is a cleat, which, being screwed to the tubs side, secures the sheet of zinc firmly in place. lhe tempering-chamber G is closed by a cover, c. The mouth of the churn Ais closed by a cover, F, having the represented parallel beveled edges f l".

My dasher is constructed as follows: The hub G is in the form of a prism of eight sides, for attachment of that number of blades, H, chamfered in the manner represen ted at their edges l 2 3, so as, when revolvedv in direction of arrow, to act to divide the milk, and to carry down air into it, and to create a violent disruption of its cells by the concussion which the milksuii'ers in the receding angles or corners 4 of the dasher. vOne end ofthe hub G rests in a socket, I, in the tub end. The other end of the hub is provided with a square socket, L, which receives the square end m of a shaft, l\l, capable of being slid in or out of the hub. The outer extremity, m', of the shaft M is also square, to receive a crank, t). The shaft M occupies a stuftingbox, P, in the tub-end, said box being packed with tow or other suitable material. A washer, Q, and cap R confine the packing within the box P.A The part otl the shaft M which traverses the box P is of somewhat larger diameter than the part outside of the box, so as to leave a shoulder, 5. The outer end of the shaft M'journals in a hanger or bridge, S, between which and the shoulder av sufficient interval is provided for the peculiarly-formed key T, by which the shaft is retained in its workin g position. The key T is an .oblong ring, broad at one end and narrow at the other. The narrow end, being up, acts to hold the shaft to its work, while, on the other hand, the broad end, being uppermost, enables the shaft M to be retracted sufficienti y to liberate the dasher for removal from the tub. To facilitate such removal the tub-end is channeled out, 6, on its inner face. An aperture, V, enables the withdrawal or insertion of the dasher.

It will be perceived that the double bottom formed of wood or other slow conductor, in all parts which are exposed tothe external air, and ot' metal where it touches the milk, acts to preserve the heating or cooling intiucnce, and appropriate it wholly to the milk.

It is found that the part 7 of the dasher nearest to the tub-side acts to rapidly form thel butter, while the more open space 8, being comparatively quiescent, permits the eliminated butter to gather together. The butter being come 7 is very quickly gathered in the open space 8 by a few reverse turns of the dasher. Thebutterhavingbeen gathered, the key T is reversed, and the shaft M having been retracted, the dasher may be lifted out, leaving the churning in thc tub. The hub may have a socket at each end, so as to be reversible when desired. Wings V maybe provided onthe endsof the dasher to expedite the churning action.

The dasher may consist of a greater or less number of blades than here illustrated, and may be formed of a single block of Wood.

lt will be seen that the sharpened blades of the dasher will enter the milk with a cutting action, which, while demanding only a slight exertion on the part of the operator, produces a violent agitation of the milk.

I claim herein as new and of my invention- 1. Thetempering-chambertl in the described combination with the movable metallic floor B, Wooden bottom A', and cover c, all con l shaft M, bridge S, and stalling-box P, of the structed, arranged, and applied in themanner tapering ring T, formed and applied in the and for the purposes herein specified. manner and for the objects speoied.

2. The manner of attaching` and detaching 5. Thearran gement of asingle rotary dasher, the metallic loor B by means of the devices G H, journaled eccentrically within the tub, c ce b b D, as herein shown and explained. l as described.

3. The dasher, consisting' of an octogonal or i In testimony of Whichinvention I hereunto other prismatic shaft, G, with chambered I; setmyhand.

straightsided boards H H H, applied one to JAMES THOMPSON. each face of the shaft and overlapping each VVitnesse-s: other, all as represented and described. GEO. H. KNIGHT,

IsAAo M. JORDAN.

4. The combination, with the retrnctible 

